Only keep a changeset for released behavior

The fixes to the multi-addon build and to --namespaced-targets both correct
code introduced on this PR's base branch, which has never been merged or
released, so they have nothing to announce in a changelog.

What remains is the part existing users can observe: the --out default and
the artifact naming. Narrowed the changeset to just those.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KfKQDvEkxNtkSE4aaF9yG8

Author: claude

.changeset/afraid-jars-attack.md

@@ -2,22 +2,13 @@
 "cmake-rn": minor
 ---
 
-Emit prebuilds per target, next to the sources they were built from.
-
-A project declaring multiple addons previously wrote every prebuild into a single
-output directory, named after the CMake target. Both are now derived per target:
-
-- The output directory defaults to `{targetSourceDir}/build/{configuration}`,
-  where the new `{targetSourceDir}` placeholder expands to the target's own source
-  directory as reported by the CMake File API. A project declaring a single addon
-  at the top level resolves to the same path as before.
-- The prebuild is named after the artifact on disk (the target's `OUTPUT_NAME`)
-  rather than the CMake target name, so a target that had to be renamed to avoid a
-  clash within the project still produces the artifact name the JS `require`
-  expects.
-
-This keeps prebuilds where the Babel plugin and auto-linking resolve them from.
-
-Note that projects setting `OUTPUT_NAME` will see the emitted prebuild named after
-`OUTPUT_NAME` rather than the target name, and that `--out` no longer defaults to a
-directory inside `--build`.
+Derive the location and name of the final artifact from the target that produced
+it, rather than emitting everything into a single directory named after the CMake
+target:
+
+- `--out` supports a new `{targetSourceDir}` placeholder, expanding to the source
+  directory of the target being emitted, and now defaults to
+  `{targetSourceDir}/build/{configuration}`. This resolves to the same path as
+  before, unless `--build` is pointed outside of the source directory.
+- The artifact is named after the target's `OUTPUT_NAME` rather than the CMake
+  target name. These are the same unless `OUTPUT_NAME` is set explicitly.